feat(game): void unreplayable games as a draw instead of erroring

A committed move that becomes illegal under a tightened rule (the single-word
connectivity fix) makes engine replay fail, which left such games unopenable —
an empty screen and an 'illegal play' error. Now the first open closes the game
gracefully as a draw (engine.EndAborted -> end_reason 'aborted', no winner),
preserves the journal, and surfaces an impersonal organizer note at the end of
the move history and in the GCG export.

- engine: EndAborted + Abort() (draw, no rack adjustment; winner -1).
- service: replay aborts on ErrIllegalPlay; liveGame persists the void once
  (lazy, on open); GameState re-reads for the settled view.
- store: VoidGame finishes the game and stamps a draw without a journal row.
- migration 00002: allow end_reason 'aborted'.
- ui: organizer note under the history grid; i18n en/ru.
- docs: ARCHITECTURE 6/9.1, FUNCTIONAL(+ru), PRERELEASE MW3.

ui/src/game/Game.svelte

@@ -917,6 +917,9 @@
               {/each}
             </div>
           </div>
+          {#if view.game.endReason === 'aborted'}
+            <p class="horganizer">{t('game.abortedNote')}</p>
+          {/if}
         </div>
       {/if}
 
@@ -1174,6 +1177,15 @@
   .hsc {
     font-variant-numeric: tabular-nums;
   }
+  /* The impersonal organizer note closing an aborted (un-replayable) game, under the grid. */
+  .horganizer {
+    margin: 0;
+    padding: 8px var(--pad);
+    color: var(--text-muted);
+    font-size: 0.85rem;
+    font-style: italic;
+    text-align: center;
+  }
   .boardwrap {
     padding: 6px;
     transition: transform 0.3s ease;

ui/src/lib/i18n/en.ts

@@ -81,6 +81,7 @@ export const en = {
   'game.won': 'You won',
   'game.lost': 'You lost',
   'game.tied': 'Draw',
+  'game.abortedNote': 'This game could not be continued by the organizer and was ended in a draw.',
   'game.checkWordPrompt': 'Enter a word',
   'game.wordLegal': '“{word}” is valid',
   'game.wordIllegal': '“{word}” is not valid',

ui/src/lib/i18n/ru.ts

@@ -82,6 +82,7 @@ export const ru: Record<MessageKey, string> = {
   'game.won': 'Вы выиграли',
   'game.lost': 'Вы проиграли',
   'game.tied': 'Ничья',
+  'game.abortedNote': 'Партия не может быть продолжена по вине организатора и завершена ничьёй.',
   'game.checkWordPrompt': 'Введите слово',
   'game.wordLegal': '«{word}» допустимо',
   'game.wordIllegal': '«{word}» недопустимо',